Office of Traffic and Safety

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Access management

(excerpt from policy guidebook)

112.14(3) Sight Distance (page 7)

112.2(36) Sight distance. The distance of clear vision along a primary highway in each direction
from any given point of access where a vehicle must stop before entering the highway.
  1. Sight distance at an access location is measured from the driver's height of eye (3.5 feet) to the height of an approaching vehicle (4.25 feet).
  2. An access location should be established where desirable sight distance is available and shall not be authorized in a location providing less than minimum sight distance, as shown below.

Posted daytime
speed limit (mph)
Desirable sight
distance (feet)
Minimum sight
distance (feet)
70
910
730
65
820
645
60
730
570
55
645
495
50
570
425
45
495
360
40
425
305
35
360
250
30
305
200

Sight distance

Access Policy

Access policy guidebook

Access Policy PDF